After all Obama has already given away a portion of the proposed ABM system in Poland with radar systems placed in Romania, Bulgaria .
Article V of New START would prohibit both sides from converting launchers for ICBMs and SLBMs into launchers for missile defense interceptors, and vice versa .
"We have no plans to convert any additional ICBM silos. In fact, it would be less expensive to build a new silo rather than convert an old one" .Russia's larger fear is that we would further expand ABM and isolate their Nuclear strike capabilities .
SLBMs however are an entirely different matter .The giveaway there is it prohibits us from using our decommissioned SSBN bombers,as launch platforms for ABM interceptors in case of an Nuclear attack .